Denison, IA Weather & Climate Normals
Denison's real weather, in one number
Denison, IA scores 43/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Denison's hottest and coldest months
Denison's hottest month is Jul, averaging 73°F; its coldest is Jan, averaging 19°F, a 54.5°F swing across the year, one of the widest gaps in this dataset.
Rain and snow in Denison
Denison averages 33.64in of precipitation a year across roughly 103 days with measurable rain or snow, and 34.5in of snow a year.
Where Denison ranks
Denison ranks 4088 of 4876 US cities in this dataset for comfort score, and 39 of 85 within IA. About 8,302 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from DENISON, IA US, 1.9 miles from Denison, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure